<template>
    <div class="todo-header">
        <input type="text" placeholder="请输入你的任务名称，按回车键确认" v-model.lazy.trim="textVal" @keyup.enter="add"/>
    </div>
</template>

<script>
import {nanoid} from 'nanoid';
export default {
    name:'MyHeader',
    data(){
        return {
            textVal:''
        }
    },
    methods: {
        add(){
            if(!this.textVal) return alert("输入不能为空");
            let todo = {id:nanoid(),title:this.textVal,done:false};
            this.$emit('addTodo',todo);
            this.textVal = '';
        }
    },
}
</script>

<style scoped>
/*header*/
  .todo-header input {
    width: 560px;
    height: 28px;
    font-size: 14px;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 4px 7px;
  }

  .todo-header input:focus {
    outline: none;
    border-color: rgba(82, 168, 236, 0.8);
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
  }
</style>